Just a quick post to say "thank you" for helping me get back into rocketry after 30 years. Several of you (rstaff3, jflis, and wscarvie, among others) have patiently answered my questions and offered many helpful suggestions. My five-year old son and I finished building our first two rockets recently and launched them last Sunday after Church. Jake absolutely loved it and tried to fly his rocket to death. His Baby Bertha went up eight times and our Big Bertha went up five. He has already begun to make plans for what our next build should be. Needless to say, he's hooked. Thanks again and happy holidays!